Holden V8 Head Bolt Kit - Aeroflow

Suits Holden 253-304-308, 12 Point Head, 8740 Grade Material

Aeroflow Performance head bolts greatly improve your cylinder head-to-block sealing compatibilities. This is important in engines with high power adders such as turbochargers, superchargers or nitrous. They can even be a great addition to a mildly modified build as insurance against failure.

These head bolts are manufactured from aircraft quality 8740 high tensile strength chromoly steel and cold-forged to ensure molecular integrity within the bolt. Meaning these bolts are rated up to 190,000 psi making them stronger than Grade 8 and OEM fasteners. All kits come complete with hardened parallel washers for an even load distribution and accurate torque readings.

Kit Contains:

14 x Long Bolts. 
105.5mm Under Head Length.
7.2mm Shank Length.
7/16-14" thread into Engine. 
18.7mm Bolt Head Diameter.

10 x Short Bolts.
44.2mm UnderHead Length.
16.2mm ShankLength.
7/16-14" thread into Engine. 
21.5mm Bolt Head Diameter.

24 x FlatWashers.
20.5mm Outside Diameter. 11.5mm Inside Diameter.
3mm Thickness.